Members of the Perovo Speleo caving team, Natasha Sizikova leads Roman Zverev along a passageway hosting a small stream descending over steps in the rock. The sculptured rock formations in this part of the Veryovkina [cave] are beautiful and really unusual. A week later, during the flood pulse that suddenly plummeted into these chambers, all of this gallery completely filled up with water and was totally submerged.